Clean up unused solstice-proto dependencies.

Cargo.lock

@@ -741,10 +741,8 @@ dependencies = [
  "bytes",
  "encoding_rs",
  "env_logger 0.9.0",
- "futures",
  "log",
  "md-5",
- "parking_lot",
  "serde",
  "serde_json",
  "thiserror",

proto/Cargo.toml

@@ -7,14 +7,12 @@ edition = "2021"
 [dependencies]
 bytes = "^1.0"
 encoding_rs = "^0.8"
-env_logger = "^0.9"
-futures = "^0.3"
 log = "^0.4"
 md-5 = "^0.9"
-parking_lot = "^0.11"
 serde = { version = "^1.0", features = ["derive"] }
 thiserror = "^1.0"
 tokio = { version = "^1.0", features = ["full"] }
 
 [dev-dependencies]
+env_logger = "^0.9"
 serde_json = "^1.0"